[gnome-builder] task: steal result for propagating pointers

[Christian Hergert <chergert src gnome org>]

commit 275225b48e43ddb2c83f735144ef8c92958dfd69
Author: Christian Hergert <chergert redhat com>
Date:   Tue Mar 27 01:25:07 2018 -0700

    task: steal result for propagating pointers
    
    These can't be copied, so to have the behavior we're trying to emulate
    from GTask, we should steal the result as we can't copy them anyway.

 src/libide/threading/ide-task.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/libide/threading/ide-task.c b/src/libide/threading/ide-task.c
index df7483761..aee1155bf 100644
--- a/src/libide/threading/ide-task.c
+++ b/src/libide/threading/ide-task.c
@@ -1474,6 +1474,8 @@ ide_task_propagate_locked (IdeTask            *self,
 
       if (priv->release_on_propagate)
         ret = g_steal_pointer (&priv->result);
+      else if (priv->result->type == IDE_TASK_RESULT_POINTER)
+        ret = g_steal_pointer (&priv->result);
       else
         ret = ide_task_result_copy (priv->result);